Comparison of Different Methods for the Detoxification of Lignocellulose Hydrolyzates of Spruce

Larsson, S; Reimann, Anders; Nilvebrant, Nils‐Olof; Jönsson, Leif J.

doi:10.1385/abab:77:1-3:91

Cited by 446 publications

(242 citation statements)

References 25 publications

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“…Vacuum evaporation is capable of reducing volatile compounds such as furfural, acetic acid and vanillin [37]. Solvents (e.g., ethyl acetate) and active charcoal and/or ion-exchange resins reduce the concentration of inhibitors by extraction or adsorption, respectively [38][39][40].…”

Section: Detoxification Of Pretreated Materialsmentioning

confidence: 99%

“…Solvents (e.g., ethyl acetate) and active charcoal and/or ion-exchange resins reduce the concentration of inhibitors by extraction or adsorption, respectively [38][39][40]. Chemical transformation of inhibitors is also possible by addition of reducing agents (dithionite and sulfite) [41] and chemical catalysts, being overliming (treatment with Ca(OH) 2 ) the most efficient chemical detoxification method for removing phenols and furan derivatives [37].…”

Section: Detoxification Of Pretreated Materialsmentioning

confidence: 99%

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Laccases as a Potential Tool for the Efficient Conversion of Lignocellulosic Biomass: A Review

et al. 2017

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Abstract:The continuous increase in the world energy and chemicals demand requires the development of sustainable alternatives to non-renewable sources of energy. Biomass facilities and biorefineries represent interesting options to gradually replace the present industry based on fossil fuels. Lignocellulose is the most promising feedstock to be used in biorefineries. From a sugar platform perspective, a wide range of fuels and chemicals can be obtained via microbial fermentation processes, being ethanol the most significant lignocellulose-derived fuel. Before fermentation, lignocellulose must be pretreated to overcome its inherent recalcitrant structure and obtain the fermentable sugars. Usually, harsh conditions are required for pretreatment of lignocellulose, producing biomass degradation and releasing different compounds that are inhibitors of the hydrolytic enzymes and fermenting microorganisms. Moreover, the lignin polymer that remains in pretreated materials also affects biomass conversion by limiting the enzymatic hydrolysis. The use of laccases has been considered as a very powerful tool for delignification and detoxification of pretreated lignocellulosic materials, boosting subsequent saccharification and fermentation processes. This review compiles the latest studies about the application of laccases as useful and environmentally friendly delignification and detoxification technology, highlighting the main challenges and possible ways to make possible the integration of these enzymes in future lignocellulose-based industries.

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Section: Detoxification Of Pretreated Materialsmentioning

confidence: 99%

Section: Detoxification Of Pretreated Materialsmentioning

confidence: 99%

Laccases as a Potential Tool for the Efficient Conversion of Lignocellulosic Biomass: A Review

et al. 2017

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“…Among these methods, adsorption is a convenient and effective technique due to simplicity of the processes, low cost, and wide practicability. The commonly-used adsorbent including activated charcoal (Larsson et al 1999), ion exchange resins combined with alkali (Zhuang et al 2009;Chandel et al 2011), and zeolites (Ranjan et al 2009). However, the activated charcoal and zeolites are relatively costly in industrial production, while ion exchange resins need a large amount of alkali to achieve a set pH value and a high amount chemical solvent for regeneration.…”

Section: Introductionmentioning

confidence: 99%

Purification of Lignocellulose Hydrolysate by Org-Attapulgite/(Divinyl Benzene-Styrene-Methyl Acrylate) Composite Adsorbent

Shi¹,

Zhang²,

Huang³

et al. 2016

BioResources

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The purification of lignocellulose hydrolysate is crucial for the efficient conversion of lignocellulose. In this study, weak polar poly(styrene-divinyl benzene-methyl acrylate) (PSDM) and composite absorbent orgattapulgite/poly(styrene-divinyl benzene-methyl acrylate) (PSDM-T) were prepared in situ by suspension polymerization for the detoxification of mixed hydrolysate. The org-attapulgite (O-A-T) used was functionalized with the silane coupling agent KH-570. The effect of O-A-T mass on PSDM-T was investigated. The results showed that the addition of a moderate mass of O-A-T improved the pores of PSDM-T and adsorption abilities. Furfural and 5-HMF (FS), total weak acids (WA), and soluble lignin (SL) were removed simultaneously. The adsorption capacities of PSDM-T for FS, WA and SL were 37.5 mg/g, 34.3 mg/g, and 87.7 mg/g, respectively. Correspondingly, their removal extents (R) were 72.6%, 18.1%, and 52.3%. The adsorption abilities of the PSDM-T for mixed hydrolysate was better than AB-8 (a commonly-used adsorption resin). The total decolorization rates (D) greater than 63%. The absorption property retains high adsorption activity after two cycles.

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“…One of the main challenges associated with 2G ethanol production is to overcome the cumulative negative effect of cell wall derived inhibitors on the fermenting microorganisms during fermentation reactions [7][8][9][10][11]. Inhibitory compounds like acids, furans and phenolic compounds interferes the fermenting microorganisms and complete process by reducing ethanol yield and productivity during fermentation.…”

Section: Introductionmentioning

confidence: 99%

Screening of Yeasts for Selection of Potential Strains and Their Utilization for In Situ Microbial Detoxification (ISMD) of Sugarcane Bagasse Hemicellulosic Hydrolysate

et al. 2016

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Many toxic compounds are produced and released in the hemicellulosic hydrolyzates during the acid pretreatment step, which are required for the disruption of the lignocelluloses matrix and sugars release. The conventional methods of detoxification i.e. overliming, activated charcoal, ion exchange or even membrane-based separations have the limitations in removal of these toxic inhibitors in fermentation process. Hence, it is imperative to explore biological methods to overcome the inhibitors by minimizing the filtration steps, sugar loss and chemical additions. In the present study we screened sixty-four strains of yeasts to select potential strains for detoxification of furfural, acetic acid, ferulic acid, 5-hydroxymethyl furfural (5-HMF) as carbon and energy source. Among these strains Pichia occidentalis M1, Y1 0 a, Y1 0 b and Y3 0 showed a significant decrease in the toxic compounds but we selected two best yeast strains i.e. P. occidentalis Y1 0 a and P. occidentalis M1 for the further experiments with an aim to remove the fermentation inhibitors. The yeasts P. occidentalis Y1 0 a and P. occidentalis M1 were grown aerobically in sugarcane bagasse hemicellulose hydrolysate under submerged cultivation. For each yeast, a 2 2 full factorial design was performed considering the variables-pH (4.0 or 5.0) and agitation rate (100 or 300 rpm), and the percentage removal of HMF, furfural, acetic acid and phenols from hemicellulosic hydrolysates were responsive variables. After 96 h of biological treatment, P. occidentalis M1 and P. occidentalis Y1 0 a showed 42.89 and 46.04 % cumulative removal of inhibitors, respectively.

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Comparison of Different Methods for the Detoxification of Lignocellulose Hydrolyzates of Spruce

Cited by 446 publications

References 25 publications

Laccases as a Potential Tool for the Efficient Conversion of Lignocellulosic Biomass: A Review

Laccases as a Potential Tool for the Efficient Conversion of Lignocellulosic Biomass: A Review

Purification of Lignocellulose Hydrolysate by Org-Attapulgite/(Divinyl Benzene-Styrene-Methyl Acrylate) Composite Adsorbent

Screening of Yeasts for Selection of Potential Strains and Their Utilization for In Situ Microbial Detoxification (ISMD) of Sugarcane Bagasse Hemicellulosic Hydrolysate

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